From Wiktionary, the free dictionary
From konz + -se.
konz-se
- sometime
- once, formerly
- Zajceva, N. G., Mullonen, M. I. (2007) “когда-то”, in Uz’ venä-vepsläine vajehnik / Novyj russko-vepsskij slovarʹ [New Russian–Veps Dictionary][1], Petrozavodsk: Periodika
